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Course: Cambridge AS & A Level Biology 9700 ...
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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

0/41

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/33

17-18 · Selection, Evolution, Classification and Conservation

0/70

19 · Genetic Technology

0/44
Quiz

3.2.7 Enzyme Inhibitors – Exam questions

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1.

A competitive inhibitor

binds elsewhere
increases the rate
denatures the enzyme
binds to the active site and competes with the substrate
2.

A noncompetitive inhibitor

binds to the active site
binds to a site other than the active site and changes the enzyme’s shape
is the substrate
has no effect
3.
A non-competitive inhibitor
binds away from the active site and changes its shape
is shaped like the substrate
is overcome by more substrate
binds the substrate
4.
Which statement best describes Competitive inhibitor?
The minimum energy needed for a reaction to start; enzymes lower it.
A permanent change to the tertiary structure and active site of an enzyme, caused by high temperature or extreme pH.
A globular protein that acts as a biological catalyst, speeding up reactions without being used up.
A molecule similar in shape to the substrate that binds the active site and blocks substrate binding.
5.
A noncompetitive inhibitor:
binds the active site
is overcome by excess substrate
increases Vmax
binds an allosteric site and changes enzyme shape
6.
A molecule that binds an enzyme at a site other than the active site and reduces activity is a
substrate
coenzyme
competitive inhibitor
noncompetitive inhibitor
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